test: add unit test for network module

Author: nimisha-gj

tests/vpc_unit_tests.tftest.hcl

@@ -0,0 +1,128 @@
+run "cidr_block_match"  {
+  command = plan
+
+  variables {
+    region        = "ap-south-1"
+    vpc_cidr_block = "10.0.0.0/16"
+
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+    condition     = aws_vpc.main.cidr_block == var.vpc_cidr_block
+    error_message = "VPC CIDR block mismatch after creation"
+  }
+}
+
+run "tags_match" {
+  command = plan
+
+  variables {
+    region            = "ap-south-1"
+    vpc_cidr_block    = "10.0.0.0/16"
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+    expected_tag_value = "atlantis-ecs-vpc"
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+condition = aws_vpc.main.tags["Name"] == var.expected_tag_value
+    error_message = "Tags mismatch after creation"
+  }
+}
+
+
+run "public_1_subnet_cidr_match"  {
+  command = plan
+
+  variables {
+    region        = "ap-south-1"
+    vpc_cidr_block = "10.0.0.0/16"
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+    condition     = aws_subnet.public_1.cidr_block == var.public_subnet_cidrs[0]
+    error_message = "Public Subnet 1 CIDR block mismatch after creation"
+  }
+}
+
+run "public_2_subnet_cidr_match" {
+  command = plan
+
+  variables {
+    region        = "ap-south-1"
+    vpc_cidr_block = "10.0.0.0/16"
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+    condition     = aws_subnet.public_2.cidr_block == var.public_subnet_cidrs[1]
+    error_message = "Public Subnet 2 CIDR block mismatch after creation"
+  }
+}
+
+run "private_1_subnet_cidr_match"  {
+  command = plan
+
+  variables {
+    region        = "ap-south-1"
+    vpc_cidr_block = "10.0.0.0/16"
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+    condition     = aws_subnet.private_1.cidr_block == var.private_subnet_cidrs[0]
+    error_message = "Private Subnet 1 CIDR block mismatch after creation"
+  }
+}
+
+run "private_2_subnet_cidr_match" {
+  command = plan
+
+  variables {
+    region        = "ap-south-1"
+    vpc_cidr_block = "10.0.0.0/16"
+    public_subnet_cidrs = ["10.0.1.0/24", "10.0.2.0/24"]
+    private_subnet_cidrs = ["10.0.3.0/24", "10.0.4.0/24"]
+    availability_zones = ["ap-south-1a", "ap-south-1b"]
+  }
+
+  module {
+    source = "./modules/network/"
+  }
+
+  assert {
+    condition     = aws_subnet.private_2.cidr_block == var.private_subnet_cidrs[1]
+    error_message = "Private Subnet 2 CIDR block mismatch after creation"
+  }
+}