1 files changed, 42 insertions, 0 deletions
diff --git a/internal/task/story_test.go b/internal/task/story_test.go
new file mode 100644
index 0000000..38d0290
--- /dev/null
+++ b/internal/task/story_test.go
@@ -0,0 +1,42 @@
+package task
+
+import "testing"
+
+func TestValidStoryTransition_Valid(t *testing.T) {
+	cases := []struct {
+		from StoryState
+		to   StoryState
+	}{
+		{StoryPending, StoryInProgress},
+		{StoryInProgress, StoryShippable},
+		{StoryInProgress, StoryNeedsFix},
+		{StoryNeedsFix, StoryInProgress},
+		{StoryShippable, StoryDeployed},
+		{StoryDeployed, StoryValidating},
+		{StoryValidating, StoryReviewReady},
+		{StoryValidating, StoryNeedsFix},
+	}
+	for _, tc := range cases {
+		if !ValidStoryTransition(tc.from, tc.to) {
+			t.Errorf("expected valid transition %s → %s", tc.from, tc.to)
+		}
+	}
+}
+
+func TestValidStoryTransition_Invalid(t *testing.T) {
+	cases := []struct {
+		from StoryState
+		to   StoryState
+	}{
+		{StoryPending, StoryDeployed},
+		{StoryReviewReady, StoryPending},
+		{StoryReviewReady, StoryInProgress},
+		{StoryReviewReady, StoryShippable},
+		{StoryShippable, StoryPending},
+	}
+	for _, tc := range cases {
+		if ValidStoryTransition(tc.from, tc.to) {
+			t.Errorf("expected invalid transition %s → %s", tc.from, tc.to)
+		}
+	}
+}