chore(functional): restructure and extend functional modules (#703)

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/core/functional/relation_spec.lua b/tests/core/functional/relation_spec.lua
new file mode 100644
index 00000000..41325cf2
--- /dev/null
+++ b/tests/core/functional/relation_spec.lua
@@ -0,0 +1,36 @@
+local _ = require "nvim-lsp-installer.core.functional"
+
+describe("functional: relation", function()
+    it("should check equality", function()
+        local tbl = {}
+        local is_tbl = _.equals(tbl)
+        local is_a = _.equals "a"
+        local is_42 = _.equals(42)
+
+        assert.is_true(is_tbl(tbl))
+        assert.is_true(is_a "a")
+        assert.is_true(is_42(42))
+        assert.is_false(is_a "b")
+        assert.is_false(is_42(32))
+    end)
+
+    it("should check property equality", function()
+        local fn_key = function() end
+        local tbl = { a = "a", b = "b", number = 42, [fn_key] = "fun" }
+        assert.is_true(_.prop_eq("a", "a", tbl))
+        assert.is_true(_.prop_eq(fn_key, "fun", tbl))
+        assert.is_true(_.prop_eq(fn_key) "fun"(tbl))
+    end)
+
+    it("should check whether property satisfies predicate", function()
+        local obj = {
+            low = 0,
+            med = 10,
+            high = 15,
+        }
+
+        assert.is_false(_.prop_satisfies(_.gt(10), "low", obj))
+        assert.is_false(_.prop_satisfies(_.gt(10), "med")(obj))
+        assert.is_true(_.prop_satisfies(_.gt(10)) "high"(obj))
+    end)
+end)