1 files changed, 351 insertions, 0 deletions
diff --git a/test/std/list_test.gleam b/test/std/list_test.gleam
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+++ b/test/std/list_test.gleam
@@ -0,0 +1,351 @@
+import std/expect
+import std/list
+import std/int
+import std/string
+
+pub fn length_test() {
+  list:length([]) |> expect:equal(_, 0)
+  list:length([1]) |> expect:equal(_, 1)
+  list:length([1, 1]) |> expect:equal(_, 2)
+  list:length([1, 1, 1]) |> expect:equal(_, 3)
+}
+
+pub fn reverse_test() {
+  list:reverse([]) |> expect:equal(_, [])
+  list:reverse([1, 2, 3, 4, 5]) |> expect:equal(_, [5, 4, 3, 2, 1])
+}
+
+pub fn is_empty_test() {
+  list:is_empty([]) |> expect:true
+  list:is_empty([1]) |> expect:false
+}
+
+pub fn contains_test() {
+  list:contains([0, 4, 5, 1], 1) |> expect:true
+  list:contains([0, 4, 5, 7], 1) |> expect:false
+  list:contains([], 1) |> expect:false
+}
+
+pub fn head_test() {
+  list:head([0, 4, 5, 7])
+    |> expect:equal(_, Ok(0))
+
+  list:head([])
+    |> expect:is_error
+}
+
+pub fn tail_test() {
+  list:tail([0, 4, 5, 7])
+    |> expect:equal(_, Ok([4, 5, 7]))
+
+  list:tail([0])
+    |> expect:equal(_, Ok([]))
+
+  list:tail([])
+    |> expect:is_error
+}
+
+pub fn filter_test() {
+  []
+    |> list:filter(_, fn(_) { True })
+    |> expect:equal(_, [])
+
+  [0, 4, 5, 7, 3]
+    |> list:filter(_, fn(_) { True })
+    |> expect:equal(_, [0, 4, 5, 7, 3])
+
+  [0, 4, 5, 7, 3]
+    |> list:filter(_, fn(x) { x > 4 })
+    |> expect:equal(_, [5, 7])
+
+  [0, 4, 5, 7, 3]
+    |> list:filter(_, fn(x) { x < 4 })
+    |> expect:equal(_, [0, 3])
+}
+
+pub fn map_test() {
+  []
+    |> list:map(_, fn(x) { x * 2 })
+    |> expect:equal(_, [])
+
+  [0, 4, 5, 7, 3]
+    |> list:map(_, fn(x) { x * 2 })
+    |> expect:equal(_, [0, 8, 10, 14, 6])
+}
+
+pub fn traverse_test() {
+  let fun = fn(x) {
+    case x == 6 || x == 5 || x == 4 {
+    | True -> Ok(x * 2)
+    | False -> Error(x)
+    }
+  }
+
+  [5, 6, 5, 6]
+    |> list:traverse(_, fun)
+    |> expect:equal(_, Ok([10, 12, 10, 12]))
+
+  [4, 6, 5, 7, 3]
+    |> list:traverse(_, fun)
+    |> expect:equal(_, Error(7))
+}
+
+pub fn drop_test() {
+  []
+    |> list:drop(_, 5)
+    |> expect:equal(_, [])
+
+  [1, 2, 3, 4, 5, 6, 7, 8]
+    |> list:drop(_, 5)
+    |> expect:equal(_, [6, 7, 8])
+}
+
+pub fn take_test() {
+  []
+    |> list:take(_, 5)
+    |> expect:equal(_, [])
+  [1, 2, 3, 4, 5, 6, 7, 8]
+    |> list:take(_, 5)
+    |> expect:equal(_, [1, 2, 3, 4, 5])
+}
+
+pub fn new_test() {
+  list:new() |> expect:equal(_, [])
+}
+
+pub fn append_test() {
+  list:append([1], [2, 3])
+    |> expect:equal(_, [1, 2, 3])
+}
+
+pub fn flatten_test() {
+  list:flatten([])
+    |> expect:equal(_, [])
+
+  list:flatten([[]])
+    |> expect:equal(_, [])
+
+  list:flatten([[], [], []])
+    |> expect:equal(_, [])
+
+  list:flatten([[1, 2], [], [3, 4]])
+    |> expect:equal(_, [1, 2, 3, 4])
+}
+
+pub fn fold_test() {
+  [1, 2, 3]
+    |> list:fold(_, [], fn(x, acc) { [x | acc] })
+    |> expect:equal(_, [3, 2, 1])
+}
+
+pub fn fold_right_test() {
+  [1, 2, 3]
+    |> list:fold_right(_, [], fn(x, acc) { [x | acc] })
+    |> expect:equal(_, [1, 2, 3])
+}
+
+pub fn find_test() {
+  let f = fn(x) {
+    case x {
+    | 2 -> Ok(4)
+    | _ -> Error(0)
+    }
+  }
+
+  [1, 2, 3]
+  |> list:find(_, f)
+  |> expect:equal(_, Ok(4))
+
+  [1, 3, 2]
+  |> list:find(_, f)
+  |> expect:equal(_, Ok(4))
+
+  [1, 3]
+  |> list:find(_, f)
+  |> expect:is_error
+}
+
+pub fn all_test() {
+  list:all([1, 2, 3, 4, 5], fn(x) { x > 0 })
+  |> expect:equal(_, True)
+
+  list:all([1, 2, 3, 4, 5], fn(x) { x < 0 })
+  |> expect:equal(_, False)
+
+  list:all([], fn(_) { False })
+  |> expect:equal(_, True)
+}
+
+pub fn any_test() {
+  list:any([1, 2, 3, 4, 5], fn(x) { x == 2 })
+  |> expect:equal(_, True)
+
+  list:any([1, 2, 3, 4, 5], fn(x) { x < 0 })
+  |> expect:equal(_, False)
+
+  list:any([], fn(_) { False })
+  |> expect:equal(_, False)
+}
+
+pub fn zip_test() {
+  list:zip([], [1, 2, 3])
+  |> expect:equal(_, [])
+
+  list:zip([1, 2], [])
+  |> expect:equal(_, [])
+
+  list:zip([1, 2, 3], [4, 5, 6])
+  |> expect:equal(_, [{1, 4}, {2, 5}, {3, 6}])
+
+  list:zip([5, 6], [1, 2, 3])
+  |> expect:equal(_, [{5, 1}, {6, 2}])
+
+  list:zip([5, 6, 7], [1, 2])
+  |> expect:equal(_, [{5, 1}, {6, 2}])
+}
+
+pub fn strict_zip_test() {
+  list:strict_zip([], [1, 2, 3])
+  |> expect:is_error
+
+  list:strict_zip([1, 2], [])
+  |> expect:is_error
+
+  list:strict_zip([1, 2, 3], [4, 5, 6])
+  |> expect:equal(_, Ok([{1, 4}, {2, 5}, {3, 6}]))
+
+  list:strict_zip([5, 6], [1, 2, 3])
+  |> expect:is_error
+
+  list:strict_zip([5, 6, 7], [1, 2])
+  |> expect:is_error
+}
+
+pub fn intersperse_test() {
+  list:intersperse([1, 2, 3], 4)
+  |> expect:equal(_, [1, 4, 2, 4, 3])
+
+  list:intersperse([], 2)
+  |> expect:equal(_, [])
+}
+
+pub fn at_test() {
+  list:at([1, 2, 3], 2)
+  |> expect:equal(_, Ok(3))
+
+  list:at([1, 2, 3], 5)
+  |> expect:is_error
+
+  list:at([], 0)
+  |> expect:is_error
+
+  list:at([1, 2, 3, 4, 5, 6], -1)
+  |> expect:is_error
+}
+
+pub fn unique_test() {
+  list:unique([1, 1, 2, 3, 4, 4, 4, 5, 6])
+  |> expect:equal(_, [1, 2, 3, 4, 5, 6])
+
+  list:unique([7, 1, 45, 6, 2, 47, 2, 7, 5])
+  |> expect:equal(_, [7, 1, 45, 6, 2, 47, 5])
+
+  list:unique([3, 4, 5])
+  |> expect:equal(_, [3, 4, 5])
+
+  list:unique([])
+  |> expect:equal(_, [])
+}
+
+pub fn sort_test() {
+  list:sort([4, 3, 6, 5, 4])
+  |> expect:equal(_, [3, 4, 4, 5, 6])
+
+  list:sort([])
+  |> expect:equal(_, [])
+
+  list:sort([{1, 2}, {4, 5}, {3, 2}])
+  |> expect:equal(_, [{1, 2}, {3, 2}, {4, 5}])
+}
+
+pub fn index_map_test() {
+  list:index_map([3, 4, 5], fn(i, x) { {i, x} })
+  |> expect:equal(_, [{0, 3}, {1, 4}, {2, 5}])
+
+  let f = fn(i, x) {
+    string:append(x, int:to_string(i))
+  }
+  list:index_map(["a", "b", "c"], f)
+  |> expect:equal(_, ["a0", "b1", "c2"])
+}
+
+pub fn range_test() {
+  list:range(0, 0)
+  |> expect:equal(_, [])
+
+  list:range(1, 1)
+  |> expect:equal(_, [])
+
+  list:range(-1, -1)
+  |> expect:equal(_, [])
+
+  list:range(0, 1)
+  |> expect:equal(_, [0])
+
+  list:range(0, 5)
+  |> expect:equal(_, [0, 1, 2, 3, 4])
+
+  list:range(1, -5)
+  |> expect:equal(_, [1, 0, -1, -2, -3, -4])
+}
+
+pub fn repeat_test() {
+  list:repeat(1, -10)
+  |> expect:equal(_, [])
+
+  list:repeat(1, 0)
+  |> expect:equal(_, [])
+
+  list:repeat(2, 3)
+  |> expect:equal(_, [2, 2, 2])
+
+  list:repeat("x", 5)
+  |> expect:equal(_, ["x", "x", "x", "x", "x"])
+}
+
+pub fn split_test() {
+  list:split([], 0)
+  |> expect:equal(_, {[], []})
+
+  list:split([0, 1, 2, 3, 4], 0)
+  |> expect:equal(_, {[], [0, 1, 2, 3, 4]})
+
+  list:split([0, 1, 2, 3, 4], -2)
+  |> expect:equal(_, {[], [0, 1, 2, 3, 4]})
+
+  list:split([0, 1, 2, 3, 4], 1)
+  |> expect:equal(_, {[0], [1, 2, 3, 4]})
+
+  list:split([0, 1, 2, 3, 4], 3)
+  |> expect:equal(_, {[0, 1, 2], [3, 4]})
+
+  list:split([0, 1, 2, 3, 4], 9)
+  |> expect:equal(_, {[0, 1, 2, 3, 4], []})
+}
+
+pub fn split_while_test() {
+  list:split_while([], fn(x) { x <= 5 })
+  |> expect:equal(_, {[], []})
+
+  list:split_while([1, 2, 3, 4, 5], fn(x) { x <= 5 })
+  |> expect:equal(_, {[1, 2, 3, 4, 5], []})
+
+  list:split_while([1, 2, 3, 4, 5], fn(x) { x == 2 })
+  |> expect:equal(_, {[], [1, 2, 3, 4, 5]})
+
+  list:split_while([1, 2, 3, 4, 5], fn(x) { x <= 3 })
+  |> expect:equal(_, {[1, 2, 3], [4, 5]})
+
+  list:split_while([1, 2, 3, 4, 5], fn(x) { x <= -3 })
+  |> expect:equal(_, {[], [1, 2, 3, 4, 5]})
+}