shard-crystal-db/spec/mapping_spec.cr

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require "./spec_helper"
require "base64"
class SimpleMapping
DB.mapping({
c0: Int32,
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c1: String,
})
end
class NonStrictMapping
DB.mapping({
c1: Int32,
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c2: String,
}, strict: false)
end
class MappingWithDefaults
DB.mapping({
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c0: {type: Int32, default: 10},
c1: {type: String, default: "c"},
})
end
class MappingWithNilables
DB.mapping({
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c0: {type: Int32, nilable: true, default: 10},
c1: {type: String, nilable: true},
})
end
class MappingWithNilTypes
DB.mapping({
c0: {type: Int32?, default: 10},
c1: String?,
})
end
class MappingWithNilUnionTypes
DB.mapping({
c0: {type: Int32 | Nil, default: 10},
c1: Nil | String,
})
end
class MappingWithKeys
DB.mapping({
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foo: {type: Int32, key: "c0"},
bar: {type: String, key: "c1"},
})
end
class MappingWithConverter
module Base64Converter
def self.from_rs(rs)
Base64.decode(rs.read(String))
end
end
DB.mapping({
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c0: {type: Slice(UInt8), converter: MappingWithConverter::Base64Converter},
c1: {type: String},
})
end
macro from_dummy(query, type)
with_dummy do |db|
rs = db.query({{ query }})
rs.move_next
%obj = {{ type }}.new(rs)
rs.close
%obj
end
end
macro expect_mapping(query, t, values)
%obj = from_dummy({{ query }}, {{ t }})
%obj.should be_a({{ t }})
{% for key, value in values %}
%obj.{{key.id}}.should eq({{value}})
{% end %}
end
describe "DB.mapping" do
it "should initialize a simple mapping" do
expect_mapping("1,a", SimpleMapping, {c0: 1, c1: "a"})
end
it "should fail to initialize a simple mapping if types do not match" do
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expect_raises ArgumentError do
from_dummy("b,a", SimpleMapping)
end
end
it "should fail to initialize a simple mapping if there is a missing column" do
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expect_raises DB::MappingException do
from_dummy("1", SimpleMapping)
end
end
it "should fail to initialize a simple mapping if there is an unexpected column" do
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expect_raises DB::MappingException do
from_dummy("1,a,b", SimpleMapping)
end
end
it "should initialize a non-strict mapping if there is an unexpected column" do
expect_mapping("1,2,a,b", NonStrictMapping, {c1: 2, c2: "a"})
end
it "should initialize a mapping with default values" do
expect_mapping("1,a", MappingWithDefaults, {c0: 1, c1: "a"})
end
it "should initialize a mapping using default values if columns are missing" do
expect_mapping("1", MappingWithDefaults, {c0: 1, c1: "c"})
end
it "should initialize a mapping using default values if values are nil and types are non nilable" do
expect_mapping("1,NULL", MappingWithDefaults, {c0: 1, c1: "c"})
end
it "should initialize a mapping with nilable set if columns are missing" do
expect_mapping("1", MappingWithNilables, {c0: 1, c1: nil})
end
it "should initialize a mapping with nilable set ignoring default value if NULL" do
expect_mapping("NULL,a", MappingWithNilables, {c0: nil, c1: "a"})
end
it "should initialize a mapping with nilable types if columns are missing" do
expect_mapping("1", MappingWithNilTypes, {c0: 1, c1: nil})
expect_mapping("1", MappingWithNilUnionTypes, {c0: 1, c1: nil})
end
it "should initialize a mapping with nilable types ignoring default value if NULL" do
expect_mapping("NULL,a", MappingWithNilTypes, {c0: nil, c1: "a"})
expect_mapping("NULL,a", MappingWithNilUnionTypes, {c0: nil, c1: "a"})
end
it "should initialize a mapping with different keys" do
expect_mapping("1,a", MappingWithKeys, {foo: 1, bar: "a"})
end
it "should initialize a mapping with a value converter" do
expect_mapping("Zm9v,a", MappingWithConverter, {c0: "foo".to_slice, c1: "a"})
end
it "should initialize multiple instances from a single resultset" do
with_dummy do |db|
db.query("1,a 2,b") do |rs|
objs = SimpleMapping.from_rs(rs)
objs.size.should eq(2)
objs[0].c0.should eq(1)
objs[0].c1.should eq("a")
objs[1].c0.should eq(2)
objs[1].c1.should eq("b")
end
end
end
it "Class.from_rs should close resultset" do
with_dummy do |db|
rs = db.query("1,a 2,b")
objs = SimpleMapping.from_rs(rs)
rs.closed?.should be_true
objs.size.should eq(2)
objs[0].c0.should eq(1)
objs[0].c1.should eq("a")
objs[1].c0.should eq(2)
objs[1].c1.should eq("b")
end
end
it "should initialize from a query_one" do
with_dummy do |db|
obj = db.query_one "1,a", as: SimpleMapping
obj.c0.should eq(1)
obj.c1.should eq("a")
end
end
it "should initialize from a query_all" do
with_dummy do |db|
objs = db.query_all "1,a 2,b", as: SimpleMapping
objs.size.should eq(2)
objs[0].c0.should eq(1)
objs[0].c1.should eq("a")
objs[1].c0.should eq(2)
objs[1].c1.should eq("b")
end
end
end