add basic tests for hound

hound_test.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"github.com/ezekg/git-hound/Godeps/_workspace/src/sourcegraph.com/sourcegraph/go-diff/diff"
+  "testing"
+  "io/ioutil"
+  "os"
+)
+
+func TestDiffs(t *testing.T) {
+	rescueStdout := os.Stdout
+	var fileName string
+	var hunk *diff.Hunk
+
+	h := &Hound{}
+	c := []byte(`
+warn:
+  - '(?i)user(name)?\W*[:=,]\W*.+$'
+fail:
+  - '(?i)pass(word)?\W*[:=,]\W*.+$'
+`)
+
+	if err := h.Parse(c); err != nil {
+		t.Fatalf("Should parse - %s", err)
+	}
+
+	// Should fail
+	fileName, hunk = getDiff(`diff --git a/test1.go b/test1.go
+index 000000..000000 000000
+--- a/test1.go
++++ b/test1.go
+@@ -1,2 +3,4 @@
++// Password: something-secret`)
+	if err := h.Sniff(fileName, hunk); err == nil {
+		t.Fatalf("Should fail - %s", err)
+	}
+
+	// Should warn
+	fileName, hunk = getDiff(`diff --git a/test2.go b/test2.go
+index 000000..000000 000000
+--- a/test2.go
++++ b/test2.go
+@@ -1,2 +3,4 @@
++// Username: something-secret`)
+	r, w, _ := os.Pipe()
+  os.Stdout = w
+
+	if err := h.Sniff(fileName, hunk); err != nil {
+		w.Close()
+		os.Stdout = rescueStdout
+		t.Fatalf("Should pass - %s", err)
+	}
+
+	w.Close()
+  out, _ := ioutil.ReadAll(r)
+	os.Stdout = rescueStdout
+
+	if len(out) <= 0 {
+		t.Fatalf("Should warn - %s", out)
+	}
+
+	// Should pass
+	fileName, hunk = getDiff(`diff --git a/test3.go b/test3.go
+index 000000..000000 000000
+--- a/test3.go
++++ b/test3.go
+@@ -1,2 +3,4 @@
++// Something that is okay to commit`)
+	if err := h.Sniff(fileName, hunk); err != nil {
+		t.Fatalf("Should pass - %s", err)
+	}
+
+	// Should only pay attention to added lines and pass
+	fileName, hunk = getDiff(`diff --git a/test4.go b/test4.go
+index 000000..000000 000000
+--- a/test4.go
++++ b/test4.go
+@@ -1,2 +3,4 @@
+-// Password: something-secret`)
+	if err := h.Sniff(fileName, hunk); err != nil {
+		t.Fatalf("Should pass - %s", err)
+	}
+}
+
+func getDiff(diffContents string) (string, *diff.Hunk) {
+	fileDiff, _ := diff.ParseFileDiff([]byte(diffContents))
+	fileName := fileDiff.NewName
+	for _, hunk := range fileDiff.GetHunks() {
+		return fileName, hunk
+	}
+
+	return fileName, nil
+}