Test for constraint in message
@@ -24,3 +24,24 @@ def test_new_resolver_conflict_requirements_file(tmpdir, script):
message = "package versions have conflicting dependencies"
assert message in result.stderr, str(result)
+
+
+def test_new_resolver_conflict_constraints_file(tmpdir, script):
+ create_basic_wheel_for_package(script, "pkg", "1.0")
+
+ constrats_file = tmpdir.joinpath("constraints.txt")
+ constrats_file.write_text("pkg!=1.0")
+
+ result = script.pip(
+ "install",
+ "--no-cache-dir", "--no-index",
+ "--find-links", script.scratch_path,
+ "-c", constrats_file,
+ "pkg==1.0",
+ expect_error=True,
+ )
+
+ assert "ResolutionImpossible" in result.stderr, str(result)
+
+ message = "The user requested (constraint) pkg!=1.0"
+ assert message in result.stdout, str(result)
