Merge pull request #1657 from ahoppen/custom-timeout

Allow overriding the timeout duration for tests

Author: ahoppen

Documentation/Environment Variables.md

@@ -17,3 +17,4 @@ The following environment variables can be used to control some behavior in Sour
 - `SKIP_LONG_TESTS`: Skip tests that typically take more than 1s to execute.
 - `SOURCEKITLSP_KEEP_TEST_SCRATCH_DIR`: Does not delete the temporary files created during test execution. Allows inspection of the test projects after the test finishes.
 - `SOURCEKIT_LSP_TEST_MODULE_CACHE`: Specifies where tests should store their shared module cache. Defaults to writing the module cache to a temporary directory. Intended so that CI systems can clean the module cache directory after running.
+- `SOURCEKIT_LSP_TEST_TIMEOUT`: Override the timeout duration for tests, in seconds.

Sources/SKTestSupport/Timeouts.swift

@@ -14,4 +14,11 @@ import Foundation
 
 /// The default duration how long tests should wait for responses from
 /// SourceKit-LSP / sourcekitd / clangd.
-package let defaultTimeout: TimeInterval = 180
+package let defaultTimeout: TimeInterval = {
+  if let customTimeoutStr = ProcessInfo.processInfo.environment["SOURCEKIT_LSP_TEST_TIMEOUT"],
+    let customTimeout = TimeInterval(customTimeoutStr)
+  {
+    return customTimeout
+  }
+  return 180
+}()