Added tests for negative offsets or larger widths / heights than tiles

brendan-ward · Apr 12, 2018 · 8df384c · 8df384c
1 parent 240f478
commit 8df384c
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Showing 3 changed files with 41 additions and 0 deletions.
diff --git a/test_data/output/test_expand.jpg b/test_data/output/test_expand.jpg
diff --git a/test_data/output/test_negative_xOff.jpg b/test_data/output/test_negative_xOff.jpg
diff --git a/tilemerge_test.go b/tilemerge_test.go
@@ -189,6 +189,26 @@ func Test_Merge_xOff(t *testing.T) {
 	verifyJPG(t, img, "test_data/output/test_xOff.jpg")
 }
 
+func Test_Merge_negative_xOff(t *testing.T) {
+	tiles := jpgTiles()
+	xOff := -100
+	yOff := 0
+	width := 2 * TILE_SIZE
+	height := 2*TILE_SIZE - yOff
+
+	img, err := Merge(tiles, xOff, yOff, width, height, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	if *update {
+		exportJPG(img, "test_data/output/test_negative_xOff.jpg")
+	}
+
+	verifyDimensions(t, img, width, height)
+	verifyJPG(t, img, "test_data/output/test_negative_xOff.jpg")
+}
+
 func Test_Merge_yOff(t *testing.T) {
 	tiles := jpgTiles()
 	xOff := 0
@@ -310,6 +330,27 @@ func Test_Merge_crop(t *testing.T) {
 	verifyJPG(t, img, "test_data/output/test_crop.jpg")
 }
 
+// Request a larger image than we have tiles to fill it
+func Test_Merge_expand(t *testing.T) {
+	tiles := jpgTiles()
+	xOff := -100
+	yOff := -50
+	width := 2*TILE_SIZE + 175  // should extend 75 px to the right of tiles
+	height := 2*TILE_SIZE + 175 // should expand 125 px to the bottom of tiles
+
+	img, err := Merge(tiles, xOff, yOff, width, height, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	if *update {
+		exportJPG(img, "test_data/output/test_expand.jpg")
+	}
+
+	verifyDimensions(t, img, width, height)
+	verifyJPG(t, img, "test_data/output/test_expand.jpg")
+}
+
 func Test_Merge_Missing_Tile(t *testing.T) {
 	tiles := jpgTiles()
 	// remove a tile's data