- Fixed issue #10018: axis scale incorrect when startDate != first day of month

3 files changed, 52 insertions, 0 deletions

diff --git a/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval1.svg b/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval1.svg
new file mode 100644
index 0000000..5bf792a
--- /dev/null
+++ b/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval1.svg
@@ -0,0 +1,2 @@
+<?xml version="1.0"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="500" height="200" version="1.0" id="ezcGraph"><defs/><g id="ezcGraphChart" color-rendering="optimizeQuality" shape-rendering="geometricPrecision" text-rendering="optimizeLegibility"><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 500.0000,0.0000 L 500.0000,200.0000 L 0.0000,200.0000 z " style="fill: #eeeeec; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_1"/><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 100.0000,0.0000 L 100.0000,200.0000 L 0.0000,200.0000 z " style="fill: #000000; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_2"/><path d=" M 2.0000,9.0000 L 9.0000,2.0000 L 16.0000,9.0000 L 9.0000,16.0000 L 2.0000,9.0000 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_3"/><path d=" M 100.0000,180.0000 L 500.0000,180.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_5"/><path d=" M 492.0000,184.0000 L 500.0000,180.0000 L 492.0000,176.0000 L 492.0000,184.0000 z " style="fill: #2e3436; 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stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_14"/><path d=" M 460.0000,20.0000 L 460.0000,180.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_16"/><path d=" M 460.0000,177.0000 L 460.0000,180.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_17"/><path d=" M 140.0000,180.0000 L 460.0000,180.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_19"/><path d=" M 140.0000,180.0000 L 143.0000,180.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_20"/><path d=" M 140.0000,160.8000 L 460.0000,159.2000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_22"/><path d=" M 140.0000,160.0000 L 141.0000,160.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_23"/><path d=" M 140.0000,140.0000 L 460.0000,140.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_24"/><path d=" M 140.0000,140.0000 L 141.0000,140.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_25"/><path d=" M 140.0000,120.8000 L 460.0000,119.2000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_26"/><path d=" M 140.0000,120.0000 L 141.0000,120.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_27"/><path d=" M 140.0000,100.0000 L 460.0000,100.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_28"/><path d=" M 140.0000,100.0000 L 143.0000,100.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_29"/><path d=" M 140.0000,80.8000 L 460.0000,79.2000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_31"/><path d=" M 140.0000,80.0000 L 141.0000,80.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_32"/><path d=" M 140.0000,60.0000 L 460.0000,60.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_33"/><path d=" M 140.0000,60.0000 L 141.0000,60.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_34"/><path d=" M 140.0000,40.8000 L 460.0000,39.2000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_35"/><path d=" M 140.0000,40.0000 L 141.0000,40.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_36"/><path d=" M 140.0000,20.0000 L 460.0000,20.0000" style="fill: none; stroke: #000000; stroke-width: 1; stroke-opacity: 0.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_37"/><path d=" M 140.0000,20.0000 L 143.0000,20.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_38"/><path d=" M 192.5667,37.1937 L 192.5667,37.1937" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_40"/><path d=" M 192.5667,37.1937 L 241.7750,58.2204" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_41"/><path d=" M 241.7750,58.2204 L 315.3685,76.6188" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_42"/><path d=" M 315.3685,76.6188 L 343.4041,95.0171" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_43"/><path d=" M 343.4041,95.0171 L 367.9352,126.5572" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_44"/><path d=" M 367.9352,126.5572 L 388.9619,150.2122" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_45"/><path d=" M 388.9619,150.2122 L 448.5375,176.3860" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_46"/><path d=" M 189.5667,37.1937 L 192.5667,34.1937 L 195.5667,37.1937 L 192.5667,40.1937 L 189.5667,37.1937 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_47"/><path d=" M 238.7750,58.2204 L 241.7750,55.2204 L 244.7750,58.2204 L 241.7750,61.2204 L 238.7750,58.2204 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_48"/><path d=" M 312.3685,76.6188 L 315.3685,73.6188 L 318.3685,76.6188 L 315.3685,79.6188 L 312.3685,76.6188 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_49"/><path d=" M 340.4041,95.0171 L 343.4041,92.0171 L 346.4041,95.0171 L 343.4041,98.0171 L 340.4041,95.0171 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_50"/><path d=" M 364.9352,126.5572 L 367.9352,123.5572 L 370.9352,126.5572 L 367.9352,129.5572 L 364.9352,126.5572 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_51"/><path d=" M 385.9619,150.2122 L 388.9619,147.2122 L 391.9619,150.2122 L 388.9619,153.2122 L 385.9619,150.2122 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_52"/><path d=" M 445.5375,176.3860 L 448.5375,173.3860 L 451.5375,176.3860 L 448.5375,179.3860 L 445.5375,176.3860 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_53"/><g id="ezcGraphTextBox_4"><path d=" M 16.5000,17.0000 L 16.5000,1.5000 L 84.7800,1.5000 L 84.7800,17.0000 L 16.5000,17.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_54"/><text id="ezcGraphTextBox_4_text" x="17" text-length="66.78px" y="13.9" style="font-size: 14px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">some data</text></g><g id="ezcGraphTextBox_9"><path d=" M 141.5000,198.0000 L 141.5000,181.5000 L 190.7000,181.5000 L 190.7000,198.0000 L 141.5000,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_55"/><text id="ezcGraphTextBox_9_text" x="142" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Oct 06</text></g><g id="ezcGraphTextBox_12"><path d=" M 248.1667,198.0000 L 248.1667,181.5000 L 297.3667,181.5000 L 297.3667,198.0000 L 248.1667,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_56"/><text id="ezcGraphTextBox_12_text" x="248.6667" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Oct 06</text></g><g id="ezcGraphTextBox_15"><path d=" M 354.8333,198.0000 L 354.8333,181.5000 L 404.0333,181.5000 L 404.0333,198.0000 L 354.8333,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_57"/><text id="ezcGraphTextBox_15_text" x="355.3333" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Nov 06</text></g><g id="ezcGraphTextBox_18"><path d=" M 409.8000,198.0000 L 409.8000,181.5000 L 459.0000,181.5000 L 459.0000,198.0000 L 409.8000,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_58"/><text id="ezcGraphTextBox_18_text" x="410.3" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Dec 06</text></g><g id="ezcGraphTextBox_21"><path d=" M 128.2000,179.0000 L 128.2000,162.5000 L 139.0000,162.5000 L 139.0000,179.0000 L 128.2000,179.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_59"/><text id="ezcGraphTextBox_21_text" x="128.7" text-length="9.3px" y="175.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">6</text></g><g id="ezcGraphTextBox_30"><path d=" M 128.2000,99.0000 L 128.2000,82.5000 L 139.0000,82.5000 L 139.0000,99.0000 L 128.2000,99.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_60"/><text id="ezcGraphTextBox_30_text" x="128.7" text-length="9.3px" y="95.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">7</text></g><g id="ezcGraphTextBox_39"><path d=" M 128.2000,38.0000 L 128.2000,21.5000 L 139.0000,21.5000 L 139.0000,38.0000 L 128.2000,38.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_61"/><text id="ezcGraphTextBox_39_text" x="128.7" text-length="9.3px" y="34.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">8</text></g></g></svg>
diff --git a/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval2.svg b/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval2.svg
new file mode 100644
index 0000000..0df8f65
--- /dev/null
+++ b/tests/data/compare/ezcGraphDateAxisTest_testMonthInterval2.svg
@@ -0,0 +1,2 @@
+<?xml version="1.0"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="500" height="200" version="1.0" id="ezcGraph"><defs/><g id="ezcGraphChart" color-rendering="optimizeQuality" shape-rendering="geometricPrecision" text-rendering="optimizeLegibility"><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 500.0000,0.0000 L 500.0000,200.0000 L 0.0000,200.0000 z " style="fill: #eeeeec; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_1"/><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 100.0000,0.0000 L 100.0000,200.0000 L 0.0000,200.0000 z " style="fill: #000000; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_2"/><path d=" M 2.0000,9.0000 L 9.0000,2.0000 L 16.0000,9.0000 L 9.0000,16.0000 L 2.0000,9.0000 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_3"/><path d=" M 100.0000,180.0000 L 500.0000,180.0000" style="fill: none; stroke: #2e3436; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_5"/><path d=" M 492.0000,184.0000 L 500.0000,180.0000 L 492.0000,176.0000 L 492.0000,184.0000 z " style="fill: #2e3436; 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stroke-linejoin: round;" id="ezcGraphLine_45"/><path d=" M 378.4486,150.2122 L 438.0242,176.3860" style="fill: none; stroke: #3465a4; stroke-width: 1; stroke-opacity: 1.00; stroke-linecap: round; stroke-linejoin: round;" id="ezcGraphLine_46"/><path d=" M 179.0534,37.1937 L 182.0534,34.1937 L 185.0534,37.1937 L 182.0534,40.1937 L 179.0534,37.1937 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_47"/><path d=" M 228.2617,58.2204 L 231.2617,55.2204 L 234.2617,58.2204 L 231.2617,61.2204 L 228.2617,58.2204 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_48"/><path d=" M 301.8551,76.6188 L 304.8551,73.6188 L 307.8551,76.6188 L 304.8551,79.6188 L 301.8551,76.6188 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_49"/><path d=" M 329.8907,95.0171 L 332.8907,92.0171 L 335.8907,95.0171 L 332.8907,98.0171 L 329.8907,95.0171 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_50"/><path d=" M 354.4219,126.5572 L 357.4219,123.5572 L 360.4219,126.5572 L 357.4219,129.5572 L 354.4219,126.5572 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_51"/><path d=" M 375.4486,150.2122 L 378.4486,147.2122 L 381.4486,150.2122 L 378.4486,153.2122 L 375.4486,150.2122 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_52"/><path d=" M 435.0242,176.3860 L 438.0242,173.3860 L 441.0242,176.3860 L 438.0242,179.3860 L 435.0242,176.3860 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_53"/><g id="ezcGraphTextBox_4"><path d=" M 16.5000,17.0000 L 16.5000,1.5000 L 84.7800,1.5000 L 84.7800,17.0000 L 16.5000,17.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_54"/><text id="ezcGraphTextBox_4_text" x="17" text-length="66.78px" y="13.9" style="font-size: 14px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">some data</text></g><g id="ezcGraphTextBox_9"><path d=" M 141.5000,198.0000 L 141.5000,181.5000 L 190.7000,181.5000 L 190.7000,198.0000 L 141.5000,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_55"/><text id="ezcGraphTextBox_9_text" x="142" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Oct 06</text></g><g id="ezcGraphTextBox_12"><path d=" M 248.1667,198.0000 L 248.1667,181.5000 L 297.3667,181.5000 L 297.3667,198.0000 L 248.1667,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_56"/><text id="ezcGraphTextBox_12_text" x="248.6667" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Nov 06</text></g><g id="ezcGraphTextBox_15"><path d=" M 354.8333,198.0000 L 354.8333,181.5000 L 404.0333,181.5000 L 404.0333,198.0000 L 354.8333,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_57"/><text id="ezcGraphTextBox_15_text" x="355.3333" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Dec 06</text></g><g id="ezcGraphTextBox_18"><path d=" M 409.8000,198.0000 L 409.8000,181.5000 L 459.0000,181.5000 L 459.0000,198.0000 L 409.8000,198.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_58"/><text id="ezcGraphTextBox_18_text" x="410.3" text-length="47.7px" y="194.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">Jan 07</text></g><g id="ezcGraphTextBox_21"><path d=" M 128.2000,179.0000 L 128.2000,162.5000 L 139.0000,162.5000 L 139.0000,179.0000 L 128.2000,179.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_59"/><text id="ezcGraphTextBox_21_text" x="128.7" text-length="9.3px" y="175.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">6</text></g><g id="ezcGraphTextBox_30"><path d=" M 128.2000,99.0000 L 128.2000,82.5000 L 139.0000,82.5000 L 139.0000,99.0000 L 128.2000,99.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_60"/><text id="ezcGraphTextBox_30_text" x="128.7" text-length="9.3px" y="95.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">7</text></g><g id="ezcGraphTextBox_39"><path d=" M 128.2000,38.0000 L 128.2000,21.5000 L 139.0000,21.5000 L 139.0000,38.0000 L 128.2000,38.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_61"/><text id="ezcGraphTextBox_39_text" x="128.7" text-length="9.3px" y="34.75" style="font-size: 15px; font-family: sans-serif; fill: #2e3436; fill-opacity: 1.00; stroke: none;">8</text></g></g></svg>
diff --git a/tests/date_axis_test.php b/tests/date_axis_test.php
index aecd37e..b4b3a97 100644
--- a/tests/date_axis_test.php
+++ b/tests/date_axis_test.php
@@ -501,6 +501,54 @@ class ezcGraphDateAxisTest extends ezcGraphTestCase
             $this->basePath . 'compare/' . __CLASS__ . '_' . __FUNCTION__ . '.svg'
         );
     }
+
+    public function testMonthInterval1()
+    {
+        $filename = $this->tempDir . __FUNCTION__ . '.svg';
+
+        $this->chart->data['some data'] = new ezcGraphArrayDataSet( array( 
+            strtotime( '2006-10-16' ) => 7.78507871321,
+            strtotime( '2006-10-30' ) => 7.52224503765,
+            strtotime( '2006-11-20' ) => 7.29226557153,
+            strtotime( '2006-11-28' ) => 7.06228610541,
+            strtotime( '2006-12-05' ) => 6.66803559206,
+            strtotime( '2006-12-11' ) => 6.37234770705,
+            strtotime( '2006-12-28' ) => 6.04517453799,
+        ) );
+        $this->chart->data['some data']->symbol = ezcGraph::DIAMOND;
+        $this->chart->xAxis->startDate = strtotime( '2006-10-01' );
+
+        $this->chart->render( 500, 200, $filename );
+
+        $this->compare(
+            $filename,
+            $this->basePath . 'compare/' . __CLASS__ . '_' . __FUNCTION__ . '.svg'
+        );
+    }
+
+    public function testMonthInterval2()
+    {
+        $filename = $this->tempDir . __FUNCTION__ . '.svg';
+
+        $this->chart->data['some data'] = new ezcGraphArrayDataSet( array( 
+            strtotime( '2006-10-16' ) => 7.78507871321,
+            strtotime( '2006-10-30' ) => 7.52224503765,
+            strtotime( '2006-11-20' ) => 7.29226557153,
+            strtotime( '2006-11-28' ) => 7.06228610541,
+            strtotime( '2006-12-05' ) => 6.66803559206,
+            strtotime( '2006-12-11' ) => 6.37234770705,
+            strtotime( '2006-12-28' ) => 6.04517453799,
+        ) );
+        $this->chart->xAxis->startDate = strtotime( '2006-10-04' );
+        $this->chart->data['some data']->symbol = ezcGraph::DIAMOND;
+
+        $this->chart->render( 500, 200, $filename );
+
+        $this->compare(
+            $filename,
+            $this->basePath . 'compare/' . __CLASS__ . '_' . __FUNCTION__ . '.svg'
+        );
+    }
 }
 
 ?>