Fixing LaTeX tests, adding new sexy natural language method spy, started testing Promises.

runtime-pyside6/tests/test_latex.py

@@ -22,6 +22,7 @@ from shutil import which
 from os.path import exists
 from re import match
 from PySide6.QtGui import QColor
+from PySide6.QtQml import QJSValue
 
 from LogarithmPlotter.util import latex
 
@@ -38,10 +39,24 @@ def latex_obj():
     directory.cleanup()
 
 
+BLACK = QColor(0, 0, 0, 255)
+BLUE = QColor(128, 128, 255, 255)
+
+def check_render_results(result):
+    if isinstance(result, QJSValue):
+        result = result.toVariant()
+    assert type(result) == str
+    [path, width, height] = result.split(",")
+    assert exists(path)
+    assert match(r"\d+", width)
+    assert match(r"\d+", height)
+    return True
+
 class TestLatex:
     def test_check_install(self, latex_obj: latex.Latex) -> None:
         assert latex_obj.latexSupported == True
         assert latex_obj.checkLatexInstallation() == True
+        assert type(latex_obj.supportsAsyncRender) is bool
         bkp = [latex.DVIPNG_PATH, latex.LATEX_PATH]
         # Check what happens when one is missing.
         latex.DVIPNG_PATH = None
@@ -55,25 +70,25 @@ class TestLatex:
         [latex.DVIPNG_PATH, latex.LATEX_PATH] = bkp
 
     def test_render_sync(self, latex_obj: latex.Latex) -> None:
-        result = latex_obj.renderSync(r"\frac{d\sqrt{\mathrm{f}(x \times 2.3)}}{dx}", 14, QColor(0, 0, 0, 255))
+        result = latex_obj.renderSync("\\frac{d \\sqrt{\\mathrm{f}(x \\times 2.3)}}{dx}", 14, BLACK)
         # Ensure result format
-        assert type(result) == str
-        [path, width, height] = result.split(",")
-        assert exists(path)
-        assert match(r"\d+", width)
-        assert match(r"\d+", height)
+        check_render_results(result)
         # Ensure it returns errors on invalid latex.
         with pytest.raises(latex.RenderError):
-            latex_obj.renderSync(r"\nonexistant", 14, QColor(0, 0, 0, 255))
+            latex_obj.renderSync("\\nonexistant", 14, BLACK)
         # Replace latex bin with one that returns errors
         bkp = latex.LATEX_PATH
         latex.LATEX_PATH = which("false")
         with pytest.raises(latex.RenderError):
-            latex_obj.renderSync(r"\mathrm{f}(x)", 14, QColor(0, 0, 0, 255))
+            latex_obj.renderSync("\\mathrm{f}(x)", 14, BLACK)
+        # Replace latex bin with one goes indefinitely
+        latex.LATEX_PATH = which("import")
+        with pytest.raises(latex.RenderError):
+            latex_obj.renderSync("\\mathrm{f}(x)", 14, BLACK)
         latex.LATEX_PATH = bkp
 
     def test_prerendered(self, latex_obj: latex.Latex) -> None:
-        args = [r"\frac{d\sqrt{\mathrm{f}(x \times 2.3)}}{dx}", 14, QColor(0, 0, 0, 255)]
+        args = ["\\frac{d \\sqrt{\\mathrm{f}(x \\times 2.3)}}{dx}", 14, BLACK]
         latex_obj.renderSync(*args)
         prerendered = latex_obj.findPrerendered(*args)
         assert type(prerendered) == str
@@ -84,3 +99,27 @@ class TestLatex:
         prerendered2 = latex_obj.findPrerendered(args[0], args[1]+2, args[2])
         assert prerendered2 == ""
 
+    def test_render_async(self, latex_obj: latex.Latex, qtbot) -> None:
+        formula = "\\int\\limits^{3x}_{-\\infty}9\\mathrm{f}(x)^3+t dx"
+        og_promise = latex_obj.renderAsync(formula, 14, BLACK)
+        # Ensure we get the same locked one if we try to render it again.
+        assert og_promise == latex_obj.renderAsync(formula, 14, BLACK)
+        # Ensure queued renders.
+        promises = [
+            latex_obj.renderAsync(formula, 14, BLUE),
+            latex_obj.renderAsync(formula, 10, BLACK),
+            latex_obj.renderAsync(formula, 10, BLUE),
+        ]
+        for prom in promises:
+            assert og_promise.calls_upon_fulfillment(prom.start)
+        # Ensure other renders get done in parallel.
+        other_promise = latex_obj.renderAsync(formula+" dt", 10, BLACK)
+        assert not og_promise.calls_upon_fulfillment(other_promise.start)
+        # Ensure all of them render.
+        proms = [og_promise, *promises, other_promise]
+        with qtbot.waitSignals(
+            [p.fulfilled for p in proms],
+            raising=True, timeout=10000,
+            check_params_cbs=[check_render_results]*len(proms)
+        ):
+            pass