test: add gloss orchestration core test suite (red phase)

Two test files for the orchestration core. All 13 tests fail at this
commit because the implementation is still stubbed.

`gloss--orchestrate-fetch-result' gets full N/B/E coverage on the
decision matrix: single def, multi def, the >1 boundary, empty defs
with each combination of :no-defs and :failed populated, and the
all-empty degenerate case.

`gloss--lookup-flow' covers cache hit (no fetch), cache miss with one
def (auto-save), cache miss with multiple (picker), cancelled picker
(no save), no-defs error, and the force-fetch override that bypasses
the cache. Mocks live at network and UI boundaries; persistence runs
against a real temp glossary so the save side effect is validated.

1 files changed, 67 insertions, 0 deletions

diff --git a/tests/test-gloss--orchestrate-fetch-result.el b/tests/test-gloss--orchestrate-fetch-result.el
new file mode 100644
index 0000000..b4a4cf8
--- /dev/null
+++ b/tests/test-gloss--orchestrate-fetch-result.el
@@ -0,0 +1,67 @@
+;;; test-gloss--orchestrate-fetch-result.el --- Tests for gloss--orchestrate-fetch-result -*- lexical-binding: t -*-
+
+;; SPDX-License-Identifier: GPL-3.0-or-later
+
+;;; Commentary:
+;; Tests for the pure pattern-matcher `gloss--orchestrate-fetch-result'.
+;; It maps a `gloss-fetch-definitions' result plist to a decision
+;; symbol that the lookup flow then dispatches on.  Full N/B/E
+;; coverage on the full decision matrix.
+
+;;; Code:
+
+(require 'ert)
+(require 'gloss)
+
+(ert-deftest test-gloss-orchestrate-fetch-result-single-def-returns-auto-save ()
+  "Normal: exactly one definition returns :auto-save."
+  (let ((result '(:defs ((:source wiktionary :text "Only sense."))
+                  :no-defs nil
+                  :failed nil)))
+    (should (eq (gloss--orchestrate-fetch-result result) :auto-save))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-multi-def-returns-pick ()
+  "Normal: more than one definition returns :pick."
+  (let ((result '(:defs ((:source wiktionary :text "First.")
+                         (:source wiktionary :text "Second.")
+                         (:source wiktionary :text "Third."))
+                  :no-defs nil
+                  :failed nil)))
+    (should (eq (gloss--orchestrate-fetch-result result) :pick))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-two-defs-returns-pick ()
+  "Boundary: exactly two definitions returns :pick (above the >1 threshold)."
+  (let ((result '(:defs ((:source wiktionary :text "A.")
+                         (:source wiktionary :text "B."))
+                  :no-defs nil
+                  :failed nil)))
+    (should (eq (gloss--orchestrate-fetch-result result) :pick))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-only-no-defs-returns-error-no-defs ()
+  "Boundary: no defs and only :no-defs sources returns :error-no-defs."
+  (let ((result '(:defs nil
+                  :no-defs (wiktionary)
+                  :failed nil)))
+    (should (eq (gloss--orchestrate-fetch-result result) :error-no-defs))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-only-failed-returns-error-failed ()
+  "Boundary: no defs and only :failed sources returns :error-failed."
+  (let ((result '(:defs nil
+                  :no-defs nil
+                  :failed (wiktionary))))
+    (should (eq (gloss--orchestrate-fetch-result result) :error-failed))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-mixed-no-defs-and-failed-returns-error-mixed ()
+  "Boundary: no defs but BOTH :no-defs and :failed populated returns :error-mixed."
+  (let ((result '(:defs nil
+                  :no-defs (wiktionary)
+                  :failed (dictionary-api))))
+    (should (eq (gloss--orchestrate-fetch-result result) :error-mixed))))
+
+(ert-deftest test-gloss-orchestrate-fetch-result-all-empty-returns-error-no-defs ()
+  "Error: degenerate result with all three keys empty returns :error-no-defs."
+  (let ((result '(:defs nil :no-defs nil :failed nil)))
+    (should (eq (gloss--orchestrate-fetch-result result) :error-no-defs))))
+
+(provide 'test-gloss--orchestrate-fetch-result)
+;;; test-gloss--orchestrate-fetch-result.el ends here