1 files changed, 72 insertions, 0 deletions
diff --git a/users/sterni/nix/string/tests/default.nix b/users/sterni/nix/string/tests/default.nix
new file mode 100644
index 000000000000..c8aec9464077
--- /dev/null
+++ b/users/sterni/nix/string/tests/default.nix
@@ -0,0 +1,72 @@
+{ depot, ... }:
+
+let
+
+  inherit (depot.users.sterni.nix)
+    string
+    ;
+
+  inherit (depot.nix.runTestsuite)
+    it
+    assertEq
+    runTestsuite
+    ;
+
+  testTakeDrop = it "tests take and drop" [
+    (assertEq "take"
+      (string.take 5 "five and more")
+      "five ")
+    (assertEq "drop"
+      (string.drop 2 "coin")
+      "in")
+    (assertEq "take out of bounds"
+      (string.take 100 "foo")
+      "foo")
+    (assertEq "drop out of bounds"
+      (string.drop 42 "lol")
+      "")
+  ];
+
+  testIndexing = it "tests string indexing" [
+    (assertEq "normal charAt"
+      (string.charAt 3 "helo")
+      "o")
+    (assertEq "out of bounds charAt"
+      (string.charAt 5 "helo")
+      null)
+  ];
+
+  testFinding = it "tests finding in strings" [
+    (assertEq "normal charIndex"
+      (string.charIndex "d" "abcdefghijkl")
+      3)
+    (assertEq "charIndex no match"
+      (string.charIndex "w" "zZzZzzzZZZ")
+      null)
+  ];
+
+  dontEval = builtins.throw "this should not get evaluated";
+
+  testMatch = it "tests match" [
+    (assertEq "basic match usage" 42
+      (string.match "answer" {
+        "answer" = 42;
+        "banana" = dontEval;
+        "maleur" = dontEval;
+      }))
+  ];
+
+  f = "f";
+  testPrintf = it "prints f" [
+    (assertEq "basic %s usage" "print ${f}" (string.printf "print %s" f))
+    (assertEq "% escaping" "100%" (string.printf "100%%"))
+  ];
+
+in
+  runTestsuite "nix.string" [
+    testTakeDrop
+    testIndexing
+    testFinding
+    testMatch
+    testPrintf
+  ]