From 49ebf7329a6661b70719a3e425196d85e2b359cb Mon Sep 17 00:00:00 2001
From: Florian Schroedl <flo.schroedl@gmail.com>
Date: Thu, 20 Jan 2022 17:00:00 +0100
Subject: [PATCH] Add tests

---
 nim_org_parse.nimble     |  8 +++++---
 src/utils/str.nim        | 27 +++++++++++++++++++++++++++
 tests/config.nims        |  4 ++++
 tests/nim.cfg            |  1 +
 tests/utils/test_str.nim | 22 ++++++++++++++++++++++
 5 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 src/utils/str.nim
 create mode 100644 tests/config.nims
 create mode 100644 tests/nim.cfg
 create mode 100644 tests/utils/test_str.nim

diff --git a/nim_org_parse.nimble b/nim_org_parse.nimble
index 5f2aed5..a54b730 100644
--- a/nim_org_parse.nimble
+++ b/nim_org_parse.nimble
@@ -17,6 +17,8 @@ requires "fusion"
 # requires "zero_functional"
 # requires "cascade"
 
-import distros
-if detectOs(NixOS):
-  foreignDep "pkgconfig"
+# Tasks
+
+task tests, "Run all tests":
+  echo "Runnign all tests"
+  exec """testament --backendLogging:off --directory:"./tests/" p "utils/*.nim""""
diff --git a/src/utils/str.nim b/src/utils/str.nim
new file mode 100644
index 0000000..1a9176a
--- /dev/null
+++ b/src/utils/str.nim
@@ -0,0 +1,27 @@
+import std/strutils
+import std/math
+
+proc safeDelete*(str: string, slice: Slice[int]): string =
+  ## Deletes the items `str[slice]`, ignoring elements out of range.
+  if slice.a > str.len - 1:
+    str
+  else:
+    let fromIndex = clamp(slice.a, 0..str.len)
+    let toIndex = clamp(slice.b, 0..str.len - 1)
+
+    var strDup = str
+    strDup.delete(fromIndex..toIndex)
+    strDup
+
+func findAndDelete*(str: string, chars: set[char], start = 0, last = str.len - 1): string =
+  ## Find the next instance of `chars` from `start`.
+  ## When found delete characters until `last`.
+  let startChar = str.find(chars, start, last)
+  if startChar == -1:
+    str
+  else:
+    str.safeDelete(startChar..last)
+
+func deleteAfterNewline*(str: string, start = 0): string =
+  ## Delete string after next Newline from `start`.
+  findAndDelete(str, Newlines, start)
diff --git a/tests/config.nims b/tests/config.nims
new file mode 100644
index 0000000..30e7629
--- /dev/null
+++ b/tests/config.nims
@@ -0,0 +1,4 @@
+switch("define", "nimUnittestOutputLevel:PRINT_FAILURES")
+switch("warnings", false)
+switch("hints", false)
+switch("path", "$projectDir/../src")
diff --git a/tests/nim.cfg b/tests/nim.cfg
new file mode 100644
index 0000000..3609521
--- /dev/null
+++ b/tests/nim.cfg
@@ -0,0 +1 @@
+--path: "../src/"
diff --git a/tests/utils/test_str.nim b/tests/utils/test_str.nim
new file mode 100644
index 0000000..473c410
--- /dev/null
+++ b/tests/utils/test_str.nim
@@ -0,0 +1,22 @@
+import std/unittest
+import utils/str
+
+suite "utils/str":
+  test "safeDelete":
+    let t = "abc"
+    check(t.safeDelete(0..0) == "abc")
+
+    check(t.safeDelete(0..1) == "c")
+    check(t.safeDelete(1..1) == "ac")
+    check(t.safeDelete(2..2) == "ab")
+
+    # Out of bounds slicing
+    check(t.safeDelete(0..10) == "")
+    check(t.safeDelete(10..1) == t)
+    check(t.safeDelete(3..3) == t)
+    check(t.safeDelete(3..(-1)) == t)
+
+  test "findAndDelete":
+    let t = "foo\nbar"
+    check(t.deleteAfterNewline() == "foo")
+    check(t.deleteAfterNewline(start = 4) == t)