tests: add shared test fixtures, expand provider breadth (multi-choice, error bodies), add LSP rewrite/diagnostics realism and table-driven tests

1 files changed, 27 insertions, 0 deletions

diff --git a/internal/testutil/fixtures.go b/internal/testutil/fixtures.go
new file mode 100644
index 0000000..41993d3
--- /dev/null
+++ b/internal/testutil/fixtures.go
@@ -0,0 +1,27 @@
+package testutil
+
+// MultilineDocBlock returns a realistic multi-line documentation block.
+func MultilineDocBlock() string {
+    return "// add adds two numbers\n// returns their sum"
+}
+
+// MultilineChatReply returns a multi-line assistant reply for chat tests.
+func MultilineChatReply() string {
+    return "Hello, world!\nThis is a multi-line reply."
+}
+
+// MultilineFunctionSuggestion returns a more realistic multi-line function body suggestion.
+func MultilineFunctionSuggestion() string {
+    return "(ctx context.Context, input string) (*CustData, error) {\n    // TODO: implement\n    return &CustData{}, nil\n}"
+}
+
+// MarkdownCodeFence returns a fenced markdown snippet used in post-processing tests.
+func MarkdownCodeFence() string {
+    return "```go\nname := value\n```"
+}
+
+// MalformedJSON returns a deliberately malformed JSON string.
+func MalformedJSON() string {
+    return "{\"choices\":[{\"delta\":{\"content\":\"oops\"}}]"
+}
+