feat: add MethodGet(methodID)

- It will be used to query each method

Author: kkweon

internal/testutils/testutils.go

@@ -12,3 +12,9 @@ func MustExtractAPITokenFromEnv() string {
 	}
 	return apiToken
 }
+
+
+// ToStringPtr returns a pointer to the given string.
+func ToStringPtr(s string) *string {
+	return &s
+}

method_get.go

@@ -0,0 +1,26 @@
+package paperswithcode_go
+
+import (
+	"encoding/json"
+	"github.com/codingpot/paperswithcode-go/v2/models"
+)
+
+// MethodGet returns a method in a paper.
+// See https://paperswithcode-client.readthedocs.io/en/latest/api/client.html#paperswithcode.client.PapersWithCodeClient.method_list
+func (c *Client) MethodGet(methodID string) (*models.Method, error) {
+	url := c.baseURL + "/methods/" + methodID
+
+	response, err := c.httpClient.Get(url)
+	if err != nil {
+		return nil, err
+	}
+
+	var result models.Method
+
+	err = json.NewDecoder(response.Body).Decode(&result)
+	if err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}

method_get_test.go

@@ -0,0 +1,43 @@
+package paperswithcode_go
+
+import (
+	"github.com/codingpot/paperswithcode-go/v2/internal/testutils"
+	"github.com/codingpot/paperswithcode-go/v2/models"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestClient_MethodGet(t *testing.T) {
+	tests := []struct {
+		name     string
+		methodID string
+		want     *models.Method
+		wantErr  bool
+	}{
+		{
+			name:     "With a correct methodID, it returns a method",
+			methodID: "multi-head-attention",
+			want: &models.Method{
+				ID:          "multi-head-attention",
+				Name:        "Multi-Head Attention",
+				FullName:    "Multi-Head Attention",
+				Description: "**Multi-head Attention** is a module for attention mechanisms which runs through an attention mechanism several times in parallel. The independent attention outputs are then concatenated and linearly transformed into the expected dimension. Intuitively, multiple attention heads allows for attending to parts of the sequence differently (e.g. longer-term dependencies versus shorter-term dependencies). \r\n\r\n$$ \\text{MultiHead}\\left(\\textbf{Q}, \\textbf{K}, \\textbf{V}\\right) = \\left[\\text{head}\\_{1},\\dots,\\text{head}\\_{h}\\right]\\textbf{W}_{0}$$\r\n\r\n$$\\text{where} \\text{ head}\\_{i} = \\text{Attention} \\left(\\textbf{Q}\\textbf{W}\\_{i}^{Q}, \\textbf{K}\\textbf{W}\\_{i}^{K}, \\textbf{V}\\textbf{W}\\_{i}^{V} \\right) $$\r\n\r\nAbove $\\textbf{W}$ are all learnable parameter matrices.\r\n\r\nNote that [scaled dot-product attention](https://paperswithcode.com/method/scaled) is most commonly used in this module, although in principle it can be swapped out for other types of attention mechanism.\r\n\r\nSource: [Lilian Weng](https://lilianweng.github.io/lil-log/2018/06/24/attention-attention.html#a-family-of-attention-mechanisms)",
+				Paper:       testutils.ToStringPtr("attention-is-all-you-need"),
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c := NewClient()
+			got, err := c.MethodGet(tt.methodID)
+			if tt.wantErr {
+				assert.Error(t, err)
+			} else {
+
+				assert.NoError(t, err)
+			}
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}