test+docs: add editor tests; document HEXAI_EDITOR/EDITOR and Custom prompt; seam client in CLI for tests

1 files changed, 39 insertions, 0 deletions

diff --git a/internal/hexaiaction/custom_action_test.go b/internal/hexaiaction/custom_action_test.go
new file mode 100644
index 0000000..451a313
--- /dev/null
+++ b/internal/hexaiaction/custom_action_test.go
@@ -0,0 +1,39 @@
+package hexaiaction
+
+import (
+    "bytes"
+    "context"
+    "testing"
+
+    "codeberg.org/snonux/hexai/internal/appconfig"
+    "codeberg.org/snonux/hexai/internal/editor"
+    "codeberg.org/snonux/hexai/internal/llm"
+    "os"
+)
+
+type llmFake2 struct{}
+func (llmFake2) Chat(_ context.Context, _ []llm.Message, _ ...llm.RequestOption) (string, error) { return "DONE", nil }
+func (llmFake2) Name() string { return "fake" }
+func (llmFake2) DefaultModel() string { return "m" }
+
+func TestActionCustom_UsesEditorPrompt(t *testing.T) {
+    // Seam: choose custom, fake client, and fake editor
+    oldChoose := chooseActionFn
+    oldNew := newClientFromApp
+    chooseActionFn = func() (ActionKind, error) { return ActionCustom, nil }
+    newClientFromApp = func(_ appconfig.App) (llm.Client, error) { return llmFake2{}, nil }
+    t.Cleanup(func(){ chooseActionFn = oldChoose; newClientFromApp = oldNew })
+
+    oldRunEd := editor.RunEditor
+    editor.RunEditor = func(_ string, path string) error {
+        return os.WriteFile(path, []byte("make it done"), 0o600)
+    }
+    t.Cleanup(func(){ editor.RunEditor = oldRunEd })
+    t.Setenv("HEXAI_EDITOR", "dummy")
+
+    in := bytes.NewBufferString("some code")
+    var out bytes.Buffer
+    var errb bytes.Buffer
+    if err := Run(context.Background(), in, &out, &errb); err != nil { t.Fatalf("Run: %v", err) }
+    if out.String() == "" { t.Fatalf("expected output") }
+}