Patience diff (#17)

WoofWare.Expect.Test/TestDiff.fs

@@ -0,0 +1,110 @@
+namespace WoofWare.Expect.Test
+
+open WoofWare.Expect
+open NUnit.Framework
+
+[<TestFixture>]
+module TestDiff =
+
+    [<Test>]
+    let ``Basic diff`` () =
+        let textA =
+            [|
+                "The quick brown fox"
+                "jumps over"
+                "the lazy dog"
+                "Some unique line here"
+                "The end"
+            |]
+
+        let textB =
+            [|
+                "The quick brown fox"
+                "Some unique line here"
+                "jumps over"
+                "the lazy dog"
+                "Another line"
+                "The end"
+            |]
+
+        let diff = Diff.patienceLines textA textB
+
+        expect {
+            snapshot
+                @"    0   0  The quick brown fox
++       1  Some unique line here
+    1   2  jumps over
+    2   3  the lazy dog
+-   3      Some unique line here
++       4  Another line
+    4   5  The end"
+
+            withFormat Diff.formatWithLineNumbers
+            return diff
+        }
+
+        expect {
+            snapshot
+                @"  The quick brown fox
++ Some unique line here
+  jumps over
+  the lazy dog
+- Some unique line here
++ Another line
+  The end"
+
+            withFormat Diff.format
+            return diff
+        }
+
+    [<Test>]
+    let ``An example from Incremental`` () =
+        let textA =
+            """digraph G {
+  rankdir = TB
+  bgcolor = transparent
+    n4 [shape=Mrecord label="{{n4|BindMain|height=2}}"  "fontname"="Sans Serif"]
+    n3 [shape=Mrecord label="{{n3|BindLhsChange|height=1}}"  "fontname"="Sans Serif"]
+    n1 [shape=Mrecord label="{{n1|Const|height=0}}"  "fontname"="Sans Serif"]
+    n2 [shape=Mrecord label="{{n2|Const|height=0}}"  "fontname"="Sans Serif"]
+  n3 -> n4
+  n2 -> n4
+  n1 -> n3
+}"""
+
+        let textB =
+            """digraph G {
+  rankdir = TB
+  bgcolor = transparent
+    n4 [shape=box label="{{n4|BindMain|height=2}}" ]
+    n3 [shape=box label="{{n3|BindLhsChange|height=1}}" ]
+    n1 [shape=box label="{{n1|Const|height=0}}" ]
+    n2 [shape=box label="{{n2|Const|height=0}}" ]
+  n3 -> n4
+  n2 -> n4
+  n1 -> n3
+}"""
+
+        let diff = Diff.patience textA textB
+
+        expect {
+            snapshot
+                @"  digraph G {
+    rankdir = TB
+    bgcolor = transparent
+-     n4 [shape=Mrecord label=""{{n4|BindMain|height=2}}""  ""fontname""=""Sans Serif""]
+-     n3 [shape=Mrecord label=""{{n3|BindLhsChange|height=1}}""  ""fontname""=""Sans Serif""]
+-     n1 [shape=Mrecord label=""{{n1|Const|height=0}}""  ""fontname""=""Sans Serif""]
+-     n2 [shape=Mrecord label=""{{n2|Const|height=0}}""  ""fontname""=""Sans Serif""]
++     n4 [shape=box label=""{{n4|BindMain|height=2}}"" ]
++     n3 [shape=box label=""{{n3|BindLhsChange|height=1}}"" ]
++     n1 [shape=box label=""{{n1|Const|height=0}}"" ]
++     n2 [shape=box label=""{{n2|Const|height=0}}"" ]
+    n3 -> n4
+    n2 -> n4
+    n1 -> n3
+  }"
+
+            withFormat Diff.format
+            return diff
+        }