Remove assert_cmd and predicates

3 files changed, 131 insertions, 227 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 4ae4ad0..5932578 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -15,15 +15,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "aho-corasick"
-version = "1.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
-dependencies = [
- "memchr",
-]
-
-[[package]]
 name = "allocator-api2"
 version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -85,21 +76,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 
 [[package]]
-name = "assert_cmd"
-version = "2.0.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed72493ac66d5804837f480ab3766c72bdfab91a65e565fc54fa9e42db0073a8"
-dependencies = [
- "anstyle",
- "bstr",
- "doc-comment",
- "predicates",
- "predicates-core",
- "predicates-tree",
- "wait-timeout",
-]
-
-[[package]]
 name = "autocfg"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -118,17 +94,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
 
 [[package]]
-name = "bstr"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05efc5cfd9110c8416e471df0e96702d58690178e206e61b7173706673c93706"
-dependencies = [
- "memchr",
- "regex-automata",
- "serde",
-]
-
-[[package]]
 name = "cassowary"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -249,18 +214,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "difflib"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6184e33543162437515c2e2b48714794e37845ec9851711914eec9d308f6ebe8"
-
-[[package]]
-name = "doc-comment"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
-
-[[package]]
 name = "either"
 version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -285,15 +238,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "float-cmp"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
-dependencies = [
- "num-traits",
-]
-
-[[package]]
 name = "fsevent-sys"
 version = "4.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -439,12 +383,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "normalize-line-endings"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61807f77802ff30975e01f4f071c8ba10c022052f98b3294119f3e615d13e5be"
-
-[[package]]
 name = "notify"
 version = "6.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -474,15 +412,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "num-traits"
-version = "0.2.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
-dependencies = [
- "autocfg",
-]
-
-[[package]]
 name = "once_cell"
 version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -528,36 +457,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
 [[package]]
-name = "predicates"
-version = "3.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b87bfd4605926cdfefc1c3b5f8fe560e3feca9d5552cf68c466d3d8236c7e8"
-dependencies = [
- "anstyle",
- "difflib",
- "float-cmp",
- "normalize-line-endings",
- "predicates-core",
- "regex",
-]
-
-[[package]]
-name = "predicates-core"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b794032607612e7abeb4db69adb4e33590fa6cf1149e95fd7cb00e634b92f174"
-
-[[package]]
-name = "predicates-tree"
-version = "1.0.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368ba315fb8c5052ab692e68a0eefec6ec57b23a36959c14496f0b0df2c0cecf"
-dependencies = [
- "predicates-core",
- "termtree",
-]
-
-[[package]]
 name = "proc-macro2"
 version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -615,46 +514,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "regex"
-version = "1.10.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b91213439dad192326a0d7c6ee3955910425f441d7038e0d6933b0aec5c4517f"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-automata",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-automata"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38caf58cc5ef2fed281f89292ef23f6365465ed9a41b7a7754eb4e26496c92df"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a66a03ae7c801facd77a29370b4faec201768915ac14a721ba36f20bc9c209b"
-
-[[package]]
 name = "rustlings"
 version = "6.1.0"
 dependencies = [
  "anyhow",
- "assert_cmd",
  "clap",
  "crossterm",
  "hashbrown",
  "notify-debouncer-mini",
  "os_pipe",
- "predicates",
  "ratatui",
  "rustlings-macros",
  "serde",
@@ -830,12 +698,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "termtree"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3369f5ac52d5eb6ab48c6b4ffdc8efbcad6b89c765749064ba298f2c68a16a76"
-
-[[package]]
 name = "toml_datetime"
 version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -899,15 +761,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
-name = "wait-timeout"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
-dependencies = [
- "libc",
-]
-
-[[package]]
 name = "walkdir"
 version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 1798923..ddf3c70 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -58,10 +58,6 @@ serde_json = "1.0.120"
 serde.workspace = true
 toml_edit.workspace = true
 
-[dev-dependencies]
-assert_cmd = "2.0.14"
-predicates = "3.1.0"
-
 [profile.release]
 panic = "abort"
 
diff --git a/tests/integration_tests.rs b/tests/integration_tests.rs
index 7d30467..d5afd2c 100644
--- a/tests/integration_tests.rs
+++ b/tests/integration_tests.rs
@@ -1,134 +1,189 @@
-use assert_cmd::prelude::*;
-use std::process::Command;
+use std::{
+    env::{self, consts::EXE_SUFFIX},
+    process::{Command, Stdio},
+    str::from_utf8,
+};
+
+#[derive(Default)]
+struct Cmd<'a> {
+    current_dir: Option<&'a str>,
+    args: &'a [&'a str],
+    stdout: Option<&'a str>,
+    full_stdout: bool,
+}
+
+impl<'a> Cmd<'a> {
+    #[inline]
+    fn current_dir(&mut self, current_dir: &'a str) -> &mut Self {
+        self.current_dir = Some(current_dir);
+        self
+    }
+
+    #[inline]
+    fn args(&mut self, args: &'a [&'a str]) -> &mut Self {
+        self.args = args;
+        self
+    }
+
+    #[inline]
+    fn stdout(&mut self, stdout: &'a str) -> &mut Self {
+        self.stdout = Some(stdout);
+        self
+    }
+
+    #[inline]
+    fn full_stdout(&mut self) -> &mut Self {
+        self.full_stdout = true;
+        self
+    }
+
+    fn assert(&self, success: bool) {
+        let rustlings_bin = {
+            let mut path = env::current_exe().unwrap();
+            // Pop test binary name
+            path.pop();
+            // Pop `/deps`
+            path.pop();
+
+            path.push("rustlings");
+            let mut path = path.into_os_string();
+            path.push(EXE_SUFFIX);
+            path
+        };
+
+        let mut cmd = Command::new(rustlings_bin);
+
+        if let Some(current_dir) = self.current_dir {
+            cmd.current_dir(current_dir);
+        }
+
+        cmd.args(self.args)
+            .stdin(Stdio::null())
+            .stderr(Stdio::null());
+
+        let status = if let Some(expected_stdout) = self.stdout {
+            let output = cmd.output().unwrap();
+            let stdout = from_utf8(&output.stdout).unwrap();
+
+            if self.full_stdout {
+                assert_eq!(stdout, expected_stdout);
+            } else {
+                assert!(stdout.contains(expected_stdout));
+            }
+
+            output.status
+        } else {
+            cmd.stdout(Stdio::null()).status().unwrap()
+        };
+
+        assert_eq!(status.success(), success);
+    }
+
+    #[inline]
+    fn success(&self) {
+        self.assert(true);
+    }
+
+    #[inline]
+    fn fail(&self) {
+        self.assert(false);
+    }
+}
 
 #[test]
 fn fails_when_in_wrong_dir() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .current_dir("tests/")
-        .assert()
-        .code(1);
+    Cmd::default().current_dir("tests").fail();
 }
 
 #[test]
 fn run_single_compile_success() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "compSuccess"])
-        .current_dir("tests/fixture/success/")
-        .assert()
+    Cmd::default()
+        .current_dir("tests/fixture/success")
+        .args(&["run", "compSuccess"])
         .success();
 }
 
 #[test]
 fn run_single_compile_failure() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "compFailure"])
-        .current_dir("tests/fixture/failure/")
-        .assert()
-        .code(1);
+    Cmd::default()
+        .current_dir("tests/fixture/failure")
+        .args(&["run", "compFailure"])
+        .fail();
 }
 
 #[test]
 fn run_single_test_success() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "testSuccess"])
-        .current_dir("tests/fixture/success/")
-        .assert()
+    Cmd::default()
+        .current_dir("tests/fixture/success")
+        .args(&["run", "testSuccess"])
         .success();
 }
 
 #[test]
 fn run_single_test_failure() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "testFailure"])
-        .current_dir("tests/fixture/failure/")
-        .assert()
-        .code(1);
+    Cmd::default()
+        .current_dir("tests/fixture/failure")
+        .args(&["run", "testFailure"])
+        .fail();
 }
 
 #[test]
 fn run_single_test_not_passed() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "testNotPassed.rs"])
-        .current_dir("tests/fixture/failure/")
-        .assert()
-        .code(1);
+    Cmd::default()
+        .current_dir("tests/fixture/failure")
+        .args(&["run", "testNotPassed.rs"])
+        .fail();
 }
 
 #[test]
 fn run_single_test_no_exercise() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "compNoExercise.rs"])
+    Cmd::default()
         .current_dir("tests/fixture/failure")
-        .assert()
-        .code(1);
+        .args(&["run", "compNoExercise.rs"])
+        .fail();
 }
 
 #[test]
 fn reset_single_exercise() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["reset", "intro1"])
-        .assert()
-        .code(0);
+    Cmd::default().args(&["reset", "intro1"]).success();
 }
 
 #[test]
 fn reset_no_exercise() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .arg("reset")
-        .assert()
-        .code(2)
-        .stderr(predicates::str::contains(
-            "required arguments were not provided",
-        ));
+    Cmd::default().args(&["reset"]).fail();
 }
 
 #[test]
 fn get_hint_for_single_test() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["hint", "testFailure"])
+    Cmd::default()
         .current_dir("tests/fixture/failure")
-        .assert()
-        .code(0)
-        .stdout("Hello!\n");
+        .args(&["hint", "testFailure"])
+        .stdout("Hello!\n")
+        .full_stdout()
+        .success();
 }
 
 #[test]
 fn run_compile_exercise_does_not_prompt() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "pending_exercise"])
+    Cmd::default()
         .current_dir("tests/fixture/state")
-        .assert()
-        .code(0);
+        .args(&["run", "pending_exercise"])
+        .success();
 }
 
 #[test]
 fn run_test_exercise_does_not_prompt() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "pending_test_exercise"])
+    Cmd::default()
         .current_dir("tests/fixture/state")
-        .assert()
-        .code(0);
+        .args(&["run", "pending_test_exercise"])
+        .success();
 }
 
 #[test]
 fn run_single_test_success_with_output() {
-    Command::cargo_bin("rustlings")
-        .unwrap()
-        .args(["run", "testSuccess"])
-        .current_dir("tests/fixture/success/")
-        .assert()
-        .code(0)
-        .stdout(predicates::str::contains("THIS TEST TOO SHALL PASS"));
+    Cmd::default()
+        .current_dir("tests/fixture/success")
+        .args(&["run", "testSuccess"])
+        .stdout("\nTHIS TEST TOO SHALL PASS\n")
+        .success();
 }