gdiplus: Add test for measuring a single line that exactly fits.

[Vincent Povirk]

This mirrors a pattern I'm seeing where a program measures a string
and uses the resulting measurement as bounds to draw it. If the string
ends in a newline, with wine's gdiplus it doesn't actually fit. This
is because our line-wrap code doesn't handle the case where we can fit
the entire contents of a line but not the newline character.

I haven't found a way to fix this yet without breaking any existing tests.
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From eddfd370d3a208c1ec99a867e0313b327fc6c631 Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent at codeweavers.com>
Date: Thu, 30 May 2013 14:47:13 -0500
Subject: [PATCH] gdiplus: Add test for measuring a single line that exactly
 fits.

---
 dlls/gdiplus/tests/graphics.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/dlls/gdiplus/tests/graphics.c b/dlls/gdiplus/tests/graphics.c
index cbe0b9d..5de0602 100644
--- a/dlls/gdiplus/tests/graphics.c
+++ b/dlls/gdiplus/tests/graphics.c
@@ -3042,6 +3042,23 @@ static void test_string_functions(void)
     expect(2, linesfilled);
     char_height = bounds.Height - char_bounds.Height;
 
+    /* Measure the first line. */
+    status = GdipMeasureString(graphics, teststring, 4, font, &rc, NULL, &bounds, &codepointsfitted, &linesfilled);
+    expect(Ok, status);
+    expectf(0.0, bounds.X);
+    expectf(0.0, bounds.Y);
+    expect(4, codepointsfitted);
+    expect(1, linesfilled);
+
+    /* Give just enough space to fit the first line. */
+    rc.Width = bounds.Width;
+    status = GdipMeasureString(graphics, teststring, 5, font, &rc, NULL, &bounds, &codepointsfitted, &linesfilled);
+    expect(Ok, status);
+    expectf(0.0, bounds.X);
+    expectf(0.0, bounds.Y);
+    todo_wine expect(5, codepointsfitted);
+    todo_wine expect(1, linesfilled);
+
     /* Cut off everything after the first space. */
     rc.Width = char_bounds.Width + char_width * 2.1;
 
-- 
1.8.1.2